An X-ray detector includes a network chip, a power supply and a sensing circuit; the sensing circuit includes a power-supply managing chip, and the power-supply managing chip is electrically connected to the network chip and the power supply; the power supply is configured for supplying electric power to the network chip and the power-supply managing chip of the sensing circuit; the power-supply managing chip is configured for, when turned on, supplying electric power to the sensing circuit; the sensing circuit is configured for, when receiving a sleeping instruction sent by an external device or is not in an operating state, turning off the power-supply managing chip, to enter a sleeping state; and the network chip is configured for, when receiving an operation instruction sent by the external device, controlling the power-supply managing chip to be turned on, whereby the sensing circuit exits the sleeping state.

An X-ray detector includes a network chip, a power supply and a sensing circuit; the sensing circuit includes a power-supply managing chip, and the power-supply managing chip is electrically connected to the network chip and the power supply; the power supply is configured for supplying electric power to the network chip and the power-supply managing chip of the sensing circuit; the power-supply managing chip is configured for, when turned on, supplying electric power to the sensing circuit; the sensing circuit is configured for, when receiving a sleeping instruction sent by an external device or is not in an operating state, turning off the power-supply managing chip, to enter a sleeping state; and the network chip is configured for, when receiving an operation instruction sent by the external device, controlling the power-supply managing chip to be turned on, whereby the sensing circuit exits the sleeping state.